This topic describes the limits of EventBridge. To prevent application exceptions, do not exceed the limits when you use EventBridge.
The following table describes the limits of EventBridge.
|Event bus||Total number of system event buses||A maximum of one system event bus is allowed.|
|Total number of custom event buses||A maximum of 10 custom event buses are allowed.|
|Number of event rules for an event bus||A maximum of 10 event rules are allowed for an event bus.|
|Name of an event bus||
|Frequency of calling the PutEvents operation||A maximum of 3,000 queries per second (QPS) are allowed.|
|Event rule||Event target of an event rule||
|Pattern of an event rule||Each field in the stringExpression pattern can contain up to five expressions in the map data structure.|
|Name of an event rule||
|Transformation of the event content||
|Schema version||A maximum of 1,000 schema versions are allowed.|